package com.wc.AlgoOJ_homework.AlgoOJ_test4.H_落石术;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

/**
 * @Author congge
 * @Date 2024/3/15 20:46
 * @description http://43.138.190.70:8888/p/707?tid=65e5720827489dab814f4cab
 */
public class Main {
    static FastReader sc = new FastReader();
    static PrintWriter out = new PrintWriter(System.out);
    static int N = 55;
    static char[][] grip = new char[N][N];
    static int t, n, m;

    public static void main(String[] args) {
        t = sc.nextInt();
        while (t-- > 0) {
            n = sc.nextInt();
            m = sc.nextInt();
            for (int i = 1; i <= n; i++) {
                grip[i] = (" " + sc.next()).toCharArray();
            }

            for (int j = 1; j <= m; j++) {
                int end = n;
                for (int i = n; i >= 0; i--) {
                    if (grip[i][j] == '*') {
                        grip[i][j] = '.';
                        grip[end][j] = '*';
                        end--;
                    } else if (grip[i][j] == 'o') {
                        end = i - 1;
                    }
                }
            }
            for (int i = 1; i <= n; i++) {
                for (int j = 1; j <= m; j++) {
                    out.print(grip[i][j]);
                }
                out.println();
            }
            out.println();
        }
        out.flush();
    }
}

class FastReader {
    StringTokenizer st;
    BufferedReader br;

    FastReader() {
        br = new BufferedReader(new InputStreamReader(System.in));
    }

    String next() {
        while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    }

    int nextInt() {
        return Integer.parseInt(next());
    }

    String nextLine() {
        String s = "";
        try {
            s = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return s;
    }

    long nextLong() {
        return Long.parseLong(next());
    }

    double nextDouble() {
        return Double.parseDouble(next());
    }

    // 是否由下一个
    boolean hasNext() {
        while (st == null || !st.hasMoreTokens()) {
            try {
                String line = br.readLine();
                if (line == null)
                    return false;
                st = new StringTokenizer(line);
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return true;
    }
}